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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fdb4c87cd6c9ee9010743e4475dd79040adfa5234b8eb3a23022e4275cef5ef' 
  AND token = 'FwjErxUWVn80i/FgNNTHq2hoKvEycQZc1RgcWTc2HvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}